#include <string.h>
#include <linux/types.h>
+#include <linux/can/netlink.h>
/* seems not to be defined in errno.h */
#ifndef ENOTSUPP
typedef __u64 u64;
typedef __u32 u32;
+struct calc_bittiming_const {
+ struct can_bittiming_const bittiming_const;
-/*
- * CAN bit-timing parameters
- *
- * For futher information, please read chapter "8 BIT TIMING
- * REQUIREMENTS" of the "Bosch CAN Specification version 2.0"
- * at http://www.semiconductors.bosch.de/pdf/can2spec.pdf.
- */
-struct can_bittiming {
- __u32 bitrate; /* Bit-rate in bits/second */
- __u32 sample_point; /* Sample point in one-tenth of a percent */
- __u32 tq; /* Time quanta (TQ) in nanoseconds */
- __u32 prop_seg; /* Propagation segment in TQs */
- __u32 phase_seg1; /* Phase buffer segment 1 in TQs */
- __u32 phase_seg2; /* Phase buffer segment 2 in TQs */
- __u32 sjw; /* Synchronisation jump width in TQs */
- __u32 brp; /* Bit-rate prescaler */
-};
-
-/*
- * CAN harware-dependent bit-timing constant
- *
- * Used for calculating and checking bit-timing parameters
- */
-struct can_bittiming_const {
- char name[16]; /* Name of the CAN controller hardware */
- __u32 tseg1_min; /* Time segement 1 = prop_seg + phase_seg1 */
- __u32 tseg1_max;
- __u32 tseg2_min; /* Time segement 2 = phase_seg2 */
- __u32 tseg2_max;
- __u32 sjw_max; /* Synchronisation jump width */
- __u32 brp_min; /* Bit-rate prescaler */
- __u32 brp_max;
- __u32 brp_inc;
-
- /* added for can-calc-bit-timing utility */
__u32 ref_clk; /* CAN system clock frequency in Hz */
void (*printf_btr)(struct can_bittiming *bt, bool hdr);
};
-/*
- * CAN clock parameters
- */
-struct can_clock {
- __u32 freq; /* CAN system clock frequency in Hz */
-};
-
-
/*
* minimal structs, just enough to be source level compatible
*/
}
}
-static struct can_bittiming_const can_calc_consts[] = {
+static struct calc_bittiming_const can_calc_consts[] = {
{
- .name = "sja1000",
- .tseg1_min = 1,
- .tseg1_max = 16,
- .tseg2_min = 1,
- .tseg2_max = 8,
- .sjw_max = 4,
- .brp_min = 1,
- .brp_max = 64,
- .brp_inc = 1,
-
+ .bittiming_const = {
+ .name = "sja1000",
+ .tseg1_min = 1,
+ .tseg1_max = 16,
+ .tseg2_min = 1,
+ .tseg2_max = 8,
+ .sjw_max = 4,
+ .brp_min = 1,
+ .brp_max = 64,
+ .brp_inc = 1,
+ },
.ref_clk = 8000000,
.printf_btr = printf_btr_sja1000,
- },
- {
- .name = "mscan",
- .tseg1_min = 4,
- .tseg1_max = 16,
- .tseg2_min = 2,
- .tseg2_max = 8,
- .sjw_max = 4,
- .brp_min = 1,
- .brp_max = 64,
- .brp_inc = 1,
-
+ }, {
+ .bittiming_const = {
+ .name = "mscan",
+ .tseg1_min = 4,
+ .tseg1_max = 16,
+ .tseg2_min = 2,
+ .tseg2_max = 8,
+ .sjw_max = 4,
+ .brp_min = 1,
+ .brp_max = 64,
+ .brp_inc = 1,
+ },
.ref_clk = 32000000,
.printf_btr = printf_btr_sja1000,
- },
- {
- .name = "mscan",
- .tseg1_min = 4,
- .tseg1_max = 16,
- .tseg2_min = 2,
- .tseg2_max = 8,
- .sjw_max = 4,
- .brp_min = 1,
- .brp_max = 64,
- .brp_inc = 1,
-
+ }, {
+ .bittiming_const = {
+ .name = "mscan",
+ .tseg1_min = 4,
+ .tseg1_max = 16,
+ .tseg2_min = 2,
+ .tseg2_max = 8,
+ .sjw_max = 4,
+ .brp_min = 1,
+ .brp_max = 64,
+ .brp_inc = 1,
+ },
.ref_clk = 33000000,
.printf_btr = printf_btr_sja1000,
- },
- {
- .name = "mscan",
- .tseg1_min = 4,
- .tseg1_max = 16,
- .tseg2_min = 2,
- .tseg2_max = 8,
- .sjw_max = 4,
- .brp_min = 1,
- .brp_max = 64,
- .brp_inc = 1,
-
+ }, {
+ .bittiming_const = {
+ .name = "mscan",
+ .tseg1_min = 4,
+ .tseg1_max = 16,
+ .tseg2_min = 2,
+ .tseg2_max = 8,
+ .sjw_max = 4,
+ .brp_min = 1,
+ .brp_max = 64,
+ .brp_inc = 1,
+ },
.ref_clk = 33300000,
.printf_btr = printf_btr_sja1000,
- },
- {
- .name = "mscan",
- .tseg1_min = 4,
- .tseg1_max = 16,
- .tseg2_min = 2,
- .tseg2_max = 8,
- .sjw_max = 4,
- .brp_min = 1,
- .brp_max = 64,
- .brp_inc = 1,
-
+ }, {
+ .bittiming_const = {
+ .name = "mscan",
+ .tseg1_min = 4,
+ .tseg1_max = 16,
+ .tseg2_min = 2,
+ .tseg2_max = 8,
+ .sjw_max = 4,
+ .brp_min = 1,
+ .brp_max = 64,
+ .brp_inc = 1,
+ },
.ref_clk = 33333333,
.printf_btr = printf_btr_sja1000,
- },
- {
- .name = "mscan",
- .tseg1_min = 4,
- .tseg1_max = 16,
- .tseg2_min = 2,
- .tseg2_max = 8,
- .sjw_max = 4,
- .brp_min = 1,
- .brp_max = 64,
- .brp_inc = 1,
-
+ }, {
+ .bittiming_const = {
+ .name = "mscan",
+ .tseg1_min = 4,
+ .tseg1_max = 16,
+ .tseg2_min = 2,
+ .tseg2_max = 8,
+ .sjw_max = 4,
+ .brp_min = 1,
+ .brp_max = 64,
+ .brp_inc = 1,
+ },
.ref_clk = 66660000, /* mpc5121 */
.printf_btr = printf_btr_sja1000,
- },
- {
- .name = "mscan",
- .tseg1_min = 4,
- .tseg1_max = 16,
- .tseg2_min = 2,
- .tseg2_max = 8,
- .sjw_max = 4,
- .brp_min = 1,
- .brp_max = 64,
- .brp_inc = 1,
-
+ }, {
+ .bittiming_const = {
+ .name = "mscan",
+ .tseg1_min = 4,
+ .tseg1_max = 16,
+ .tseg2_min = 2,
+ .tseg2_max = 8,
+ .sjw_max = 4,
+ .brp_min = 1,
+ .brp_max = 64,
+ .brp_inc = 1,
+ },
.ref_clk = 66666666, /* mpc5121 */
.printf_btr = printf_btr_sja1000,
- },
- {
- .name = "at91",
- .tseg1_min = 4,
- .tseg1_max = 16,
- .tseg2_min = 2,
- .tseg2_max = 8,
- .sjw_max = 4,
- .brp_min = 2,
- .brp_max = 128,
- .brp_inc = 1,
-
+ }, {
+ .bittiming_const = {
+ .name = "at91",
+ .tseg1_min = 4,
+ .tseg1_max = 16,
+ .tseg2_min = 2,
+ .tseg2_max = 8,
+ .sjw_max = 4,
+ .brp_min = 2,
+ .brp_max = 128,
+ .brp_inc = 1,
+ },
.ref_clk = 100000000,
.printf_btr = printf_btr_at91,
- },
- {
- .name = "at91",
- .tseg1_min = 4,
- .tseg1_max = 16,
- .tseg2_min = 2,
- .tseg2_max = 8,
- .sjw_max = 4,
- .brp_min = 2,
- .brp_max = 128,
- .brp_inc = 1,
-
+ }, {
+ .bittiming_const = {
+ .name = "at91",
+ .tseg1_min = 4,
+ .tseg1_max = 16,
+ .tseg2_min = 2,
+ .tseg2_max = 8,
+ .sjw_max = 4,
+ .brp_min = 2,
+ .brp_max = 128,
+ .brp_inc = 1,
+ },
/* real world clock as found on the ronetix PM9263 */
.ref_clk = 99532800,
.printf_btr = printf_btr_at91,
- },
- {
- .name = "flexcan",
- .tseg1_min = 4,
- .tseg1_max = 16,
- .tseg2_min = 2,
- .tseg2_max = 8,
- .sjw_max = 4,
- .brp_min = 1,
- .brp_max = 256,
- .brp_inc = 1,
-
+ }, {
+ .bittiming_const = {
+ .name = "flexcan",
+ .tseg1_min = 4,
+ .tseg1_max = 16,
+ .tseg2_min = 2,
+ .tseg2_max = 8,
+ .sjw_max = 4,
+ .brp_min = 1,
+ .brp_max = 256,
+ .brp_inc = 1,
+ },
.ref_clk = 24000000, /* mx28 */
.printf_btr = printf_btr_flexcan,
- },
- {
- .name = "flexcan",
- .tseg1_min = 4,
- .tseg1_max = 16,
- .tseg2_min = 2,
- .tseg2_max = 8,
- .sjw_max = 4,
- .brp_min = 1,
- .brp_max = 256,
- .brp_inc = 1,
-
+ }, {
+ .bittiming_const = {
+ .name = "flexcan",
+ .tseg1_min = 4,
+ .tseg1_max = 16,
+ .tseg2_min = 2,
+ .tseg2_max = 8,
+ .sjw_max = 4,
+ .brp_min = 1,
+ .brp_max = 256,
+ .brp_inc = 1,
+ },
.ref_clk = 30000000, /* mx6 */
.printf_btr = printf_btr_flexcan,
- },
- {
- .name = "flexcan",
- .tseg1_min = 4,
- .tseg1_max = 16,
- .tseg2_min = 2,
- .tseg2_max = 8,
- .sjw_max = 4,
- .brp_min = 1,
- .brp_max = 256,
- .brp_inc = 1,
-
+ }, {
+ .bittiming_const = {
+ .name = "flexcan",
+ .tseg1_min = 4,
+ .tseg1_max = 16,
+ .tseg2_min = 2,
+ .tseg2_max = 8,
+ .sjw_max = 4,
+ .brp_min = 1,
+ .brp_max = 256,
+ .brp_inc = 1,
+ },
.ref_clk = 49875000,
.printf_btr = printf_btr_flexcan,
- },
- {
- .name = "flexcan",
- .tseg1_min = 4,
- .tseg1_max = 16,
- .tseg2_min = 2,
- .tseg2_max = 8,
- .sjw_max = 4,
- .brp_min = 1,
- .brp_max = 256,
- .brp_inc = 1,
-
+ }, {
+ .bittiming_const = {
+ .name = "flexcan",
+ .tseg1_min = 4,
+ .tseg1_max = 16,
+ .tseg2_min = 2,
+ .tseg2_max = 8,
+ .sjw_max = 4,
+ .brp_min = 1,
+ .brp_max = 256,
+ .brp_inc = 1,
+ },
.ref_clk = 66000000,
.printf_btr = printf_btr_flexcan,
- },
- {
- .name = "flexcan",
- .tseg1_min = 4,
- .tseg1_max = 16,
- .tseg2_min = 2,
- .tseg2_max = 8,
- .sjw_max = 4,
- .brp_min = 1,
- .brp_max = 256,
- .brp_inc = 1,
-
+ }, {
+ .bittiming_const = {
+ .name = "flexcan",
+ .tseg1_min = 4,
+ .tseg1_max = 16,
+ .tseg2_min = 2,
+ .tseg2_max = 8,
+ .sjw_max = 4,
+ .brp_min = 1,
+ .brp_max = 256,
+ .brp_inc = 1,
+ },
.ref_clk = 66500000,
.printf_btr = printf_btr_flexcan,
- },
- {
- .name = "flexcan",
- .tseg1_min = 4,
- .tseg1_max = 16,
- .tseg2_min = 2,
- .tseg2_max = 8,
- .sjw_max = 4,
- .brp_min = 1,
- .brp_max = 256,
- .brp_inc = 1,
-
+ }, {
+ .bittiming_const = {
+ .name = "flexcan",
+ .tseg1_min = 4,
+ .tseg1_max = 16,
+ .tseg2_min = 2,
+ .tseg2_max = 8,
+ .sjw_max = 4,
+ .brp_min = 1,
+ .brp_max = 256,
+ .brp_inc = 1,
+ },
.ref_clk = 66666666,
.printf_btr = printf_btr_flexcan,
- },
- {
- .name = "flexcan",
- .tseg1_min = 4,
- .tseg1_max = 16,
- .tseg2_min = 2,
- .tseg2_max = 8,
- .sjw_max = 4,
- .brp_min = 1,
- .brp_max = 256,
- .brp_inc = 1,
-
+ }, {
+ .bittiming_const = {
+ .name = "flexcan",
+ .tseg1_min = 4,
+ .tseg1_max = 16,
+ .tseg2_min = 2,
+ .tseg2_max = 8,
+ .sjw_max = 4,
+ .brp_min = 1,
+ .brp_max = 256,
+ .brp_inc = 1,
+ },
.ref_clk = 83368421,
.printf_btr = printf_btr_flexcan, /* vybrid */
- },
- {
- .name = "mcp251x",
- .tseg1_min = 3,
- .tseg1_max = 16,
- .tseg2_min = 2,
- .tseg2_max = 8,
- .sjw_max = 4,
- .brp_min = 1,
- .brp_max = 64,
- .brp_inc = 1,
-
+ }, {
+ .bittiming_const = {
+ .name = "mcp251x",
+ .tseg1_min = 3,
+ .tseg1_max = 16,
+ .tseg2_min = 2,
+ .tseg2_max = 8,
+ .sjw_max = 4,
+ .brp_min = 1,
+ .brp_max = 64,
+ .brp_inc = 1,
+ },
.ref_clk = 8000000,
.printf_btr = printf_btr_mcp251x,
- },
- {
- .name = "mcp251x",
- .tseg1_min = 3,
- .tseg1_max = 16,
- .tseg2_min = 2,
- .tseg2_max = 8,
- .sjw_max = 4,
- .brp_min = 1,
- .brp_max = 64,
- .brp_inc = 1,
-
+ }, {
+ .bittiming_const = {
+ .name = "mcp251x",
+ .tseg1_min = 3,
+ .tseg1_max = 16,
+ .tseg2_min = 2,
+ .tseg2_max = 8,
+ .sjw_max = 4,
+ .brp_min = 1,
+ .brp_max = 64,
+ .brp_inc = 1,
+ },
.ref_clk = 16000000,
.printf_btr = printf_btr_mcp251x,
- },
- {
- .name = "ti_hecc",
- .tseg1_min = 1,
- .tseg1_max = 16,
- .tseg2_min = 1,
- .tseg2_max = 8,
- .sjw_max = 4,
- .brp_min = 1,
- .brp_max = 256,
- .brp_inc = 1,
-
+ }, {
+ .bittiming_const = {
+ .name = "ti_hecc",
+ .tseg1_min = 1,
+ .tseg1_max = 16,
+ .tseg2_min = 1,
+ .tseg2_max = 8,
+ .sjw_max = 4,
+ .brp_min = 1,
+ .brp_max = 256,
+ .brp_inc = 1,
+ },
.ref_clk = 13000000,
.printf_btr = printf_btr_ti_hecc,
- },
- {
- .name = "rcar_can",
- .tseg1_min = 4,
- .tseg1_max = 16,
- .tseg2_min = 2,
- .tseg2_max = 8,
- .sjw_max = 4,
- .brp_min = 1,
- .brp_max = 1024,
- .brp_inc = 1,
-
+ }, {
+ .bittiming_const = {
+ .name = "rcar_can",
+ .tseg1_min = 4,
+ .tseg1_max = 16,
+ .tseg2_min = 2,
+ .tseg2_max = 8,
+ .sjw_max = 4,
+ .brp_min = 1,
+ .brp_max = 1024,
+ .brp_inc = 1,
+ },
.ref_clk = 65000000,
.printf_btr = printf_btr_rcar_can,
},
return sampl_pt;
}
-static void print_bit_timing(const struct can_bittiming_const *btc,
+static void print_bit_timing(const struct calc_bittiming_const *btc,
__u32 bitrate, __u32 sample_point, __u32 ref_clk,
bool quiet)
{
struct net_device dev = {
- .priv.bittiming_const = btc,
+ .priv.bittiming_const = &btc->bittiming_const,
.priv.clock.freq = ref_clk,
};
struct can_bittiming bt = {
printf("Bit timing parameters for %s with %.6f MHz ref clock\n"
"nominal real Bitrt nom real SampP\n"
"Bitrate TQ[ns] PrS PhS1 PhS2 SJW BRP Bitrate Error SampP SampP Error ",
- btc->name,
+ btc->bittiming_const.name,
ref_clk / 1000000.0);
btc->printf_btr(&bt, true);
unsigned int i;
for (i = 0; i < ARRAY_SIZE(can_calc_consts); i++)
- printf("%s\n", can_calc_consts[i].name);
+ printf("%s\n", can_calc_consts[i].bittiming_const.name);
}
int main(int argc, char *argv[])
unsigned int i, j;
int opt;
- const struct can_bittiming_const *btc = NULL;
+ const struct calc_bittiming_const *btc = NULL;
while ((opt = getopt(argc, argv, "b:c:lps:")) != -1) {
switch (opt) {
print_usage(argv[0]);
for (i = 0; i < ARRAY_SIZE(can_calc_consts); i++) {
- if (name && strcmp(can_calc_consts[i].name, name))
+ if (name && strcmp(can_calc_consts[i].bittiming_const.name, name))
continue;
found = true;
projects / can-utils.git / commitdiff